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Day 163: CDS Maths

5 questions. Try each one first, then open its answer.

  1. Question 1

    Averages. Asked once: CDS 1 2019 (same type asked 4 times) See all 4 of this type

    81
    A library has an average number of 510 visitors on Sunday and 240 on other days. What is the average number of visitors per day in a month of 30 days beginning with Saturday ?

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  2. Question 2

    Data Interpretation. Asked once: CDS 1 2018 (same type asked 4 times) See all 4 of this type

    51
    A Pie Chart is drawn for the following data :
    SectorPercentage
    Agriculture and Rural Development12.9
    Irrigation12.5
    Energy27.2
    Industry and Minerals15.4
    Transport and Communication15.9
    Social Services16.1
    What is the angle (approximately) subtended by the Social Services Sector at the centre of the circle?

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  3. Question 3

    Heights and Distances. Asked once: CDS 1 2023 (same type asked 4 times) See all 4 of this type

    55
    A woman is standing on the deck of a ship, which is hh (in metres) above water level. She observes the angle of elevation of the top of a tower as 60∘60^\circ and the angle of depression of the base of the tower as 30∘30^\circ. What is the height of the tower ?

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  4. Question 4

    Mensuration 3D. Asked once: CDS 1 2025 (same type asked 4 times) See all 4 of this type

    11
    A lamp is kept on a vertical pole. The height of the top of the lamp above the ground is 532\dfrac{5\sqrt{3}}{2} m. The perpendicular distances of the bottom of the pole from two adjacent walls meeting perpendicularly are 0.7 m and 2.4 m. What is the distance of the top of the lamp from the corner point of the walls on the ground ?

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  5. Question 5

    Polynomials. Asked once: CDS 1 2020 (same type asked 4 times) See all 4 of this type

    49
    If (x2−1)(x^2 - 1) is a factor of ax4+bx3+cx2+dx+eax^4 + bx^3 + cx^2 + dx + e, then which one of the following is correct?

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